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&and&&. While eagerness is one of the differences between&and&&,&behaves completely differently from an eager version of&&, particularly in languages where&&supports types other than a dedicated boolean type.1 & 2has a completely different result from1 && 2.booltype in C has knock-on effects. We need both!and~because one means "treat an int as a single Boolean" and one means "treat an int as a packed array of Booleans". If you have separate bool and int types then you can have just one operator, which in my opinion would have been the better design, but we're almost 50 years late on that one. C# preserves this design for familiarity.